## General Chemistry 10th Edition

$4.6994\times 10^{-19}J$
We know that $\nu=\frac{c}{\lambda}$ $\nu=\frac{2.998\times 10^8}{4.227\times 10^{-7}}=7.025\times 10^{14}\frac{m}{s}$ We also know that $E=h\nu$ $E=6.626\times 10^{-34}\times 7.0925\times 10^{14}=4.6994\times 10^{-19}J$